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<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../span.html" title="cpp/header/span"><tt>&lt;span&gt;</tt></a> <span class="t-mark-rev t-since-cxx20">(C++20)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../array.html" title="cpp/header/array"><tt>&lt;array&gt;</tt></a> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../vector.html" title="cpp/header/vector"><tt>&lt;vector&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../deque.html" title="cpp/header/deque"><tt>&lt;deque&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../forward_list.html" title="cpp/header/forward list"><tt>&lt;forward_list&gt;</tt></a> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../list.html" title="cpp/header/list"><tt>&lt;list&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../map.html" title="cpp/header/map"><tt>&lt;map&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../set.html" title="cpp/header/set"><tt>&lt;set&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../queue.html" title="cpp/header/queue"><tt>&lt;queue&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../unordered_map.html" title="cpp/header/unordered map"><tt>&lt;unordered_map&gt;</tt></a> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../unordered_set.html" title="cpp/header/unordered set"><tt>&lt;unordered_set&gt;</tt></a> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../stack.html" title="cpp/header/stack"><tt>&lt;stack&gt;</tt></a></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Iterators</td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../iterator.html" title="cpp/header/iterator"><tt>&lt;iterator&gt;</tt></a></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Ranges</td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../ranges.html" title="cpp/header/ranges"><tt>&lt;ranges&gt;</tt></a> <span class="t-mark-rev t-since-cxx20">(C++20)</span></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Algorithms</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../algorithm.html" title="cpp/header/algorithm"><tt>&lt;algorithm&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../execution.html" title="cpp/header/execution"><tt>&lt;execution&gt;</tt></a> <span class="t-mark-rev t-since-cxx17">(C++17)</span></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Numerics</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../complex.html" title="cpp/header/complex"><tt>&lt;complex&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../random.html" title="cpp/header/random"><tt>&lt;random&gt;</tt></a> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../valarray.html" title="cpp/header/valarray"><tt>&lt;valarray&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../numeric.html" title="cpp/header/numeric"><tt>&lt;numeric&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../bit.html" title="cpp/header/bit"><tt>&lt;bit&gt;</tt></a> <span class="t-mark-rev t-since-cxx20">(C++20)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../numbers.html" title="cpp/header/numbers"><tt>&lt;numbers&gt;</tt></a> <span class="t-mark-rev t-since-cxx20">(C++20)</span></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../cfenv.html" title="cpp/header/cfenv"><tt>&lt;cfenv&gt;</tt></a> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../cmath.html" title="cpp/header/cmath"><tt>&lt;cmath&gt;</tt></a></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Input/Output</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../iosfwd.html" title="cpp/header/iosfwd"><tt>&lt;iosfwd&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../ios.html" title="cpp/header/ios"><tt>&lt;ios&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../iomanip.html" title="cpp/header/iomanip"><tt>&lt;iomanip&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../streambuf.html" title="cpp/header/streambuf"><tt>&lt;streambuf&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../istream.html" title="cpp/header/istream"><tt>&lt;istream&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../ostream.html" title="cpp/header/ostream"><tt>&lt;ostream&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../iostream.html" title="cpp/header/iostream"><tt>&lt;iostream&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <br>
</td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../syncstream.html" title="cpp/header/syncstream"><tt>&lt;syncstream&gt;</tt></a> <span class="t-mark-rev t-since-cxx20">(C++20)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../spanstream.html" title="cpp/header/spanstream"><tt>&lt;spanstream&gt;</tt></a> <span class="t-mark-rev t-since-cxx23">(C++23)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../sstream.html" title="cpp/header/sstream"><tt>&lt;sstream&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../fstream.html" title="cpp/header/fstream"><tt>&lt;fstream&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../cstdio.html" title="cpp/header/cstdio"><tt>&lt;cstdio&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../cinttypes.html" title="cpp/header/cinttypes"><tt>&lt;cinttypes&gt;</tt></a> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../strstream.html" title="cpp/header/strstream"><tt>&lt;strstream&gt;</tt></a> <span class="t-mark">(C++98/)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <br>
</td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Regular expressions</td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../regex.html" title="cpp/header/regex"><tt>&lt;regex&gt;</tt></a> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Filesystem support</td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../filesystem.html" title="cpp/header/filesystem"><tt>&lt;filesystem&gt;</tt></a> <span class="t-mark-rev t-since-cxx17">(C++17)</span></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Thread support</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../thread.html" title="cpp/header/thread"><tt>&lt;thread&gt;</tt></a> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../atomic.html" title="cpp/header/atomic"><tt>&lt;atomic&gt;</tt></a> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../mutex.html" title="cpp/header/mutex"><tt>&lt;mutex&gt;</tt></a> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../shared_mutex.html" title="cpp/header/shared mutex"><tt>&lt;shared_mutex&gt;</tt></a> <span class="t-mark-rev t-since-cxx14">(C++14)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../condition_variable.html" title="cpp/header/condition variable"><tt>&lt;condition_variable&gt;</tt></a> <span class="t-mark-rev t-since-cxx11">(C++11)</span>  </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../future.html" title="cpp/header/future"><tt>&lt;future&gt;</tt></a> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../stop_token.html" title="cpp/header/stop token"><tt>&lt;stop_token&gt;</tt></a> <span class="t-mark-rev t-since-cxx20">(C++20)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../semaphore.html" title="cpp/header/semaphore"><tt>&lt;semaphore&gt;</tt></a> <span class="t-mark-rev t-since-cxx20">(C++20)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <br>
</td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../latch.html" title="cpp/header/latch"><tt>&lt;latch&gt;</tt></a> <span class="t-mark-rev t-since-cxx20">(C++20)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../barrier.html" title="cpp/header/barrier"><tt>&lt;barrier&gt;</tt></a> <span class="t-mark-rev t-since-cxx20">(C++20)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <br>
</td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> C compatibility</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../cstdbool.html" title="cpp/header/cstdbool"><tt>&lt;cstdbool&gt;</tt></a> <span class="t-mark">(C++11/17/20)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../ccomplex.html" title="cpp/header/ccomplex"><tt>&lt;ccomplex&gt;</tt></a> <span class="t-mark">(C++11/17/20)</span></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../ctgmath.html" title="cpp/header/ctgmath"><tt>&lt;ctgmath&gt;</tt></a> <span class="t-mark">(C++11/17/20)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../cstdalign.html" title="cpp/header/cstdalign"><tt>&lt;cstdalign&gt;</tt></a> <span class="t-mark">(C++11/17/20)</span></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../../ciso646.html" title="cpp/header/ciso646"><tt>&lt;ciso646&gt;</tt></a> <span class="t-mark-rev t-until-cxx20">(until C++20)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../../stdatomic.h.html" title="cpp/header/stdatomic.h"><tt>&lt;stdatomic.h&gt;</tt></a></td></tr>
</table></div></td></tr>
</table></div><div></div></div></div></div><div class="t-navbar-sep"> </div><div class="t-navbar-head"><a href="../../experimental.html" title="cpp/header/experimental"> Experimental library headers</a><div class="t-navbar-menu"><div><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv-h2"><td colspan="5"> Filesystem TS</td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../filesystem.html" title="cpp/header/experimental/filesystem"><tt>&lt;experimental/filesystem&gt;</tt></a></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Parallelism TS (v1, v2)</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/algorithm&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/algorithm (page does not exist)"><tt>&lt;experimental/algorithm&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/execution_policy&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/execution policy (page does not exist)"><tt>&lt;experimental/execution_policy&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/exception_list&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/exception list (page does not exist)"><tt>&lt;experimental/exception_list&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/numeric&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/numeric (page does not exist)"><tt>&lt;experimental/numeric&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../simd.html" title="cpp/header/experimental/simd"><tt>&lt;experimental/simd&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/task_block&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/task block (page does not exist)"><tt>&lt;experimental/task_block&gt;</tt></a></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Library Fundamentals TS (v1, v2, v3)</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/algorithm&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/algorithm (page does not exist)"><tt>&lt;experimental/algorithm&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../any.html" title="cpp/header/experimental/any"><tt>&lt;experimental/any&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/array&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/array (page does not exist)"><tt>&lt;experimental/array&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/chrono&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/chrono (page does not exist)"><tt>&lt;experimental/chrono&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/deque&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/deque (page does not exist)"><tt>&lt;experimental/deque&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/forward_list&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/forward list (page does not exist)"><tt>&lt;experimental/forward_list&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../functional.html" title="cpp/header/experimental/functional"><tt>&lt;experimental/functional&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/future&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/future (page does not exist)"><tt>&lt;experimental/future&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/iterator&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/iterator (page does not exist)"><tt>&lt;experimental/iterator&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/list&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/list (page does not exist)"><tt>&lt;experimental/list&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/map&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/map (page does not exist)"><tt>&lt;experimental/map&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/memory&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/memory (page does not exist)"><tt>&lt;experimental/memory&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../memory_resource.html" title="cpp/header/experimental/memory resource"><tt>&lt;experimental/memory_resource&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/numeric&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/numeric (page does not exist)"><tt>&lt;experimental/numeric&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../optional.html" title="cpp/header/experimental/optional"><tt>&lt;experimental/optional&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/propagate_const&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/propagate const (page does not exist)"><tt>&lt;experimental/propagate_const&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/random&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/random (page does not exist)"><tt>&lt;experimental/random&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/ratio&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/ratio (page does not exist)"><tt>&lt;experimental/ratio&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/regex&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/regex (page does not exist)"><tt>&lt;experimental/regex&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/scope&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/scope (page does not exist)"><tt>&lt;experimental/scope&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/set&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/set (page does not exist)"><tt>&lt;experimental/set&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/source_location&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/source location (page does not exist)"><tt>&lt;experimental/source_location&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/string&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/string (page does not exist)"><tt>&lt;experimental/string&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../string_view.html" title="cpp/header/experimental/string view"><tt>&lt;experimental/string_view&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/system_error&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/system error (page does not exist)"><tt>&lt;experimental/system_error&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/tuple&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/tuple (page does not exist)"><tt>&lt;experimental/tuple&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/type_traits&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/type traits (page does not exist)"><tt>&lt;experimental/type_traits&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/unordered_map&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/unordered map (page does not exist)"><tt>&lt;experimental/unordered_map&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/unordered_set&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/unordered set (page does not exist)"><tt>&lt;experimental/unordered_set&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/utility&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/utility (page does not exist)"><tt>&lt;experimental/utility&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/vector&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/vector (page does not exist)"><tt>&lt;experimental/vector&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <br>
</td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Concurrency TS</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/atomic&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/atomic (page does not exist)"><tt>&lt;experimental/atomic&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/barrier&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/barrier (page does not exist)"><tt>&lt;experimental/barrier&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/future&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/future (page does not exist)"><tt>&lt;experimental/future&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/latch&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/latch (page does not exist)"><tt>&lt;experimental/latch&gt;</tt></a></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Ranges TS</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="algorithm.html" title="cpp/header/experimental/ranges/algorithm"><tt>&lt;experimental/ranges/algorithm&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="concepts.html" title="cpp/header/experimental/ranges/concepts"><tt>&lt;experimental/ranges/concepts&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="functional.html" title="cpp/header/experimental/ranges/functional"><tt>&lt;experimental/ranges/functional&gt;</tt></a>     </td></tr>
<tr class="t-nv"><td colspan="5"> <strong class="selflink"><tt>&lt;experimental/ranges/iterator&gt;</tt></strong></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="random.html" title="cpp/header/experimental/ranges/random"><tt>&lt;experimental/ranges/random&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="tuple.html" title="cpp/header/experimental/ranges/tuple"><tt>&lt;experimental/ranges/tuple&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="type_traits.html" title="cpp/header/experimental/ranges/type traits"><tt>&lt;experimental/ranges/type_traits&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="utility.html" title="cpp/header/experimental/ranges/utility"><tt>&lt;experimental/ranges/utility&gt;</tt></a></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Coroutines TS</td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/coroutine&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/coroutine (page does not exist)"><tt>&lt;experimental/coroutine&gt;</tt></a></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Networking TS</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/buffer&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/buffer (page does not exist)"><tt>&lt;experimental/buffer&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/executor&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/executor (page does not exist)"><tt>&lt;experimental/executor&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/internet&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/internet (page does not exist)"><tt>&lt;experimental/internet&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/io_context&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/io context (page does not exist)"><tt>&lt;experimental/io_context&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"> <a href="../net.html" title="cpp/header/experimental/net"><tt>&lt;experimental/net&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/netfwd&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/netfwd (page does not exist)"><tt>&lt;experimental/netfwd&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/socket&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/socket (page does not exist)"><tt>&lt;experimental/socket&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://en.cppreference.com/mwiki/index.php?title=cpp/header/experimental/timer&amp;action=edit&amp;redlink=1" class="new" title="cpp/header/experimental/timer (page does not exist)"><tt>&lt;experimental/timer&gt;</tt></a></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Reflection TS</td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../reflect.html" title="cpp/header/experimental/reflect"><tt>&lt;experimental/reflect&gt;</tt></a></td></tr>
</table></div><div></div></div></div></div><div class="t-navbar-sep"> </div></div>
<p>This header is part of the <a href="../../../experimental/ranges.html" title="cpp/experimental/ranges">ranges</a> library.
</p>
<h3><span class="mw-headline" id="Iterator-related_concepts"> Iterator-related concepts </span></h3>
<table class="t-dsc-begin">

<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in  namespace <code>std::experimental::ranges</code> </div>
</td></tr>
</table>
<h4><span class="mw-headline" id="Iterator_concepts"> Iterator concepts </span></h4>
<table class="t-dsc-begin">

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/Readable.html" title="cpp/experimental/ranges/iterator/Readable"> <span class="t-lines"><span>Readable</span></span></a></div></div>
</td>
<td>  specifies that a type is readable by applying operator <code>*</code>  <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/Writable.html" title="cpp/experimental/ranges/iterator/Writable"> <span class="t-lines"><span>Writable</span></span></a></div></div>
</td>
<td>  specifies that a value can be written to an iterator's referenced object <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/WeaklyIncrementable.html" title="cpp/experimental/ranges/iterator/WeaklyIncrementable"> <span class="t-lines"><span>WeaklyIncrementable</span></span></a></div></div>
</td>
<td>   specifies that a <a href="../../../experimental/ranges/concepts/Semiregular.html" title="cpp/experimental/ranges/concepts/Semiregular"><code>Semiregular</code></a> type can be incremented with pre- and post-increment operators <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/Incrementable.html" title="cpp/experimental/ranges/iterator/Incrementable"> <span class="t-lines"><span>Incrementable</span></span></a></div></div>
</td>
<td>   specifies that the increment operation on a <a href="../../../experimental/ranges/iterator/WeaklyIncrementable.html" title="cpp/experimental/ranges/iterator/WeaklyIncrementable"><code>WeaklyIncrementable</code></a> type is equality-preserving and that the type is <a href="../../../experimental/ranges/concepts/EqualityComparable.html" title="cpp/experimental/ranges/concepts/EqualityComparable"><code>EqualityComparable</code></a>  <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/Iterator.html" title="cpp/experimental/ranges/iterator/Iterator"> <span class="t-lines"><span>Iterator</span></span></a></div></div>
</td>
<td>   specifies that objects of a type can be incremented and dereferenced  <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/Sentinel.html" title="cpp/experimental/ranges/iterator/Sentinel"> <span class="t-lines"><span>Sentinel</span></span></a></div></div>
</td>
<td>   specifies that objects of a type is a sentinel for an <a href="../../../experimental/ranges/iterator/Iterator.html" title="cpp/experimental/ranges/iterator/Iterator"><code>Iterator</code></a> type <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/SizedSentinel.html" title="cpp/experimental/ranges/iterator/SizedSentinel"> <span class="t-lines"><span>SizedSentinel</span></span></a></div></div>
</td>
<td>   specifies that the <code>-</code> operator can be applied to an iterator and a sentinel to calculate their difference in constant time  <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/InputIterator.html" title="cpp/experimental/ranges/iterator/InputIterator"> <span class="t-lines"><span>InputIterator</span></span></a></div></div>
</td>
<td>   specifies that a type is an input iterator, that is, its referenced values can be read and it can be both pre- and post-incremented  <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/OutputIterator.html" title="cpp/experimental/ranges/iterator/OutputIterator"> <span class="t-lines"><span>OutputIterator</span></span></a></div></div>
</td>
<td>   specifies that a type is an output iterator for a given value type, that is, values of that type can be written to it and it can be both pre- and post-incremented  <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/ForwardIterator.html" title="cpp/experimental/ranges/iterator/ForwardIterator"> <span class="t-lines"><span>ForwardIterator</span></span></a></div></div>
</td>
<td>   specifies that an <a href="../../../experimental/ranges/iterator/InputIterator.html" title="cpp/experimental/ranges/iterator/InputIterator"><code>InputIterator</code></a> is a forward iterator, supporting equality comparison and multi-pass <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/BidirectionalIterator.html" title="cpp/experimental/ranges/iterator/BidirectionalIterator"> <span class="t-lines"><span>BidirectionalIterator</span></span></a></div></div>
</td>
<td>   specifies that a <a href="../../../experimental/ranges/iterator/ForwardIterator.html" title="cpp/experimental/ranges/iterator/ForwardIterator"><code>ForwardIterator</code></a> is a bidirectional iterator, supporting movement backwards  <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/RandomAccessIterator.html" title="cpp/experimental/ranges/iterator/RandomAccessIterator"> <span class="t-lines"><span>RandomAccessIterator</span></span></a></div></div>
</td>
<td>   specifies that a <a href="../../../experimental/ranges/iterator/BidirectionalIterator.html" title="cpp/experimental/ranges/iterator/BidirectionalIterator"><code>BidirectionalIterator</code></a> is a random-access iterator, supporting advancement in constant time and subscripting  <br> <span class="t-mark">(concept)</span> </td></tr>
</table>
<h4><span class="mw-headline" id="Indirect_callable_concepts"> Indirect callable concepts </span></h4>
<table class="t-dsc-begin">

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/IndirectUnaryInvocable.html" title="cpp/experimental/ranges/iterator/IndirectUnaryInvocable"> <span class="t-lines"><span>IndirectUnaryInvocable</span><span>IndirectRegularUnaryInvocable</span></span></a></div></div>
</td>
<td>  specifies that a callable type can be invoked with the result of dereferencing a <a href="../../../experimental/ranges/iterator/Readable.html" title="cpp/experimental/ranges/iterator/Readable"><code>Readable</code></a> type <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/IndirectUnaryPredicate.html" title="cpp/experimental/ranges/iterator/IndirectUnaryPredicate"> <span class="t-lines"><span>IndirectUnaryPredicate</span></span></a></div></div>
</td>
<td>  specifies that a callable object, when invoked with the result of dereferencing a <a href="../../../experimental/ranges/iterator/Readable.html" title="cpp/experimental/ranges/iterator/Readable"><code>Readable</code></a> type, satisfies <a href="../../../experimental/ranges/concepts/Predicate.html" title="cpp/experimental/ranges/concepts/Predicate"><code>Predicate</code></a> <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/IndirectRelation.html" title="cpp/experimental/ranges/iterator/IndirectRelation"> <span class="t-lines"><span>IndirectRelation</span></span></a></div></div>
</td>
<td>   specifies that a callable object, when invoked with the result of dereferencing some <a href="../../../experimental/ranges/iterator/Readable.html" title="cpp/experimental/ranges/iterator/Readable"><code>Readable</code></a> types, satisfies <a href="../../../experimental/ranges/concepts/Relation.html" title="cpp/experimental/ranges/concepts/Relation"><code>Relation</code></a> <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/IndirectStrictWeakOrder.html" title="cpp/experimental/ranges/iterator/IndirectStrictWeakOrder"> <span class="t-lines"><span>IndirectStrictWeakOrder</span></span></a></div></div>
</td>
<td>  specifies that a callable object, when invoked with the result of dereferencing some <a href="../../../experimental/ranges/iterator/Readable.html" title="cpp/experimental/ranges/iterator/Readable"><code>Readable</code></a> types, satisfies <a href="../../../experimental/ranges/concepts/StrictWeakOrder.html" title="cpp/experimental/ranges/concepts/StrictWeakOrder"><code>StrictWeakOrder</code></a> <br> <span class="t-mark">(concept)</span> </td></tr>
</table>
<h4><span class="mw-headline" id="Common_algorithm_requirements"> Common algorithm requirements </span></h4>
<table class="t-dsc-begin">

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/IndirectlyMovable.html" title="cpp/experimental/ranges/iterator/IndirectlyMovable"> <span class="t-lines"><span>IndirectlyMovable</span></span></a></div></div>
</td>
<td>   specifies that values may be moved from a <a href="../../../experimental/ranges/iterator/Readable.html" title="cpp/experimental/ranges/iterator/Readable"><code>Readable</code></a> type to a <a href="../../../experimental/ranges/iterator/Writable.html" title="cpp/experimental/ranges/iterator/Writable"><code>Writable</code></a> type  <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/IndirectlyMovableStorable.html" title="cpp/experimental/ranges/iterator/IndirectlyMovableStorable"> <span class="t-lines"><span>IndirectlyMovableStorable</span></span></a></div></div>
</td>
<td>  specifies that values may be moved from a <a href="../../../experimental/ranges/iterator/Readable.html" title="cpp/experimental/ranges/iterator/Readable"><code>Readable</code></a> type to a <a href="../../../experimental/ranges/iterator/Writable.html" title="cpp/experimental/ranges/iterator/Writable"><code>Writable</code></a> type and that the move may be performed via an intermediate object  <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/IndirectlyCopyable.html" title="cpp/experimental/ranges/iterator/IndirectlyCopyable"> <span class="t-lines"><span>IndirectlyCopyable</span></span></a></div></div>
</td>
<td>  specifies that values may be copied from a <a href="../../../experimental/ranges/iterator/Readable.html" title="cpp/experimental/ranges/iterator/Readable"><code>Readable</code></a> type to a <a href="../../../experimental/ranges/iterator/Writable.html" title="cpp/experimental/ranges/iterator/Writable"><code>Writable</code></a> type  <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/IndirectlyCopyableStorable.html" title="cpp/experimental/ranges/iterator/IndirectlyCopyableStorable"> <span class="t-lines"><span>IndirectlyCopyableStorable</span></span></a></div></div>
</td>
<td>   specifies that values may be copied from a <a href="../../../experimental/ranges/iterator/Readable.html" title="cpp/experimental/ranges/iterator/Readable"><code>Readable</code></a> type to a <a href="../../../experimental/ranges/iterator/Writable.html" title="cpp/experimental/ranges/iterator/Writable"><code>Writable</code></a> type and that the copy may be performed via an intermediate object <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/IndirectlySwappable.html" title="cpp/experimental/ranges/iterator/IndirectlySwappable"> <span class="t-lines"><span>IndirectlySwappable</span></span></a></div></div>
</td>
<td>   specifies that the values referenced by two <a href="../../../experimental/ranges/iterator/Readable.html" title="cpp/experimental/ranges/iterator/Readable"><code>Readable</code></a> types can be swapped <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/IndirectlyComparable.html" title="cpp/experimental/ranges/iterator/IndirectlyComparable"> <span class="t-lines"><span>IndirectlyComparable</span></span></a></div></div>
</td>
<td>   specifies that the values referenced by two <a href="../../../experimental/ranges/iterator/Readable.html" title="cpp/experimental/ranges/iterator/Readable"><code>Readable</code></a> types can be compared <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/Permutable.html" title="cpp/experimental/ranges/iterator/Permutable"> <span class="t-lines"><span>Permutable</span></span></a></div></div>
</td>
<td>   specifies the common requirements of algorithms that reorder elements in place  <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/Mergeable.html" title="cpp/experimental/ranges/iterator/Mergeable"> <span class="t-lines"><span>Mergeable</span></span></a></div></div>
</td>
<td>   specifies the requirements of algorithms that merge sorted sequences into an output sequence by copying elements  <br> <span class="t-mark">(concept)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/Sortable.html" title="cpp/experimental/ranges/iterator/Sortable"> <span class="t-lines"><span>Sortable</span></span></a></div></div>
</td>
<td>   specifies the common requirements of algorithms that permute sequences into ordered sequences  <br> <span class="t-mark">(concept)</span> </td></tr>
</table>
<h4><span class="mw-headline" id="Concept_utilities"> Concept utilities </span></h4>
<table class="t-dsc-begin">

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/indirect_result_of.html" title="cpp/experimental/ranges/iterator/indirect result of"> <span class="t-lines"><span>indirect_result_of</span></span></a></div></div>
</td>
<td>  compute the result of invoking a callable object on the result of dereferencing some set of <a href="../../../experimental/ranges/iterator/Readable.html" title="cpp/experimental/ranges/iterator/Readable"><code>Readable</code></a> types <br> <span class="t-mark">(class template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/projected.html" title="cpp/experimental/ranges/iterator/projected"> <span class="t-lines"><span>projected</span></span></a></div></div>
</td>
<td>  helper template for specifying the constraints on algorithms that accept projections <br> <span class="t-mark">(class template)</span> </td></tr>
</table>
<h3><span class="mw-headline" id="Iterator_primitives"> Iterator primitives </span></h3>
<h4><span class="mw-headline" id="Iterator_utilities"> Iterator utilities </span></h4>
<table class="t-dsc-begin">

<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in  namespace <code>std::experimental::ranges</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://en.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/iterator/iter_move&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/iterator/iter move (page does not exist)"> <span class="t-lines"><span>iter_move</span></span></a></div></div>
</td>
<td>   casts the result of dereferencing an object to its associated rvalue reference type <br> <span class="t-mark">(customization point object)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://en.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/iterator/iter_swap&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/iterator/iter swap (page does not exist)"> <span class="t-lines"><span>iter_swap</span></span></a></div></div>
</td>
<td>   swap the values referenced by two dereferenceable objects <br> <span class="t-mark">(customization point object)</span> </td></tr>
</table>
<h4><span class="mw-headline" id="Iterator_traits"> Iterator traits </span></h4>
<table class="t-dsc-begin">

<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in  namespace <code>std::experimental::ranges</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/difference_type.html" title="cpp/experimental/ranges/iterator/difference type"> <span class="t-lines"><span>difference_type</span></span></a></div></div>
</td>
<td>  obtains the difference type of a <a href="../../../experimental/ranges/iterator/WeaklyIncrementable.html" title="cpp/experimental/ranges/iterator/WeaklyIncrementable"><code>WeaklyIncrementable</code></a> type <br> <span class="t-mark">(class template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/value_type.html" title="cpp/experimental/ranges/iterator/value type"> <span class="t-lines"><span>value_type</span></span></a></div></div>
</td>
<td>  obtains the value type of a <a href="../../../experimental/ranges/iterator/Readable.html" title="cpp/experimental/ranges/iterator/Readable"><code>Readable</code></a> type <br> <span class="t-mark">(class template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/iterator_category.html" title="cpp/experimental/ranges/iterator/iterator category"> <span class="t-lines"><span>iterator_category</span></span></a></div></div>
</td>
<td>  obtains the iterator category of an input iterator type  <br> <span class="t-mark">(class template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://en.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/iterator/iterator_traits&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/iterator/iterator traits (page does not exist)"> <span class="t-lines"><span>iterator_traits</span></span></a></div></div>
</td>
<td>   compatibility traits class that collects an iterator’s associated types <br> <span class="t-mark">(alias template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/reference_t.html" title="cpp/experimental/ranges/iterator/reference t"> <span class="t-lines"><span>reference_t</span><span>rvalue_reference_t</span><span>iter_common_reference_t</span></span></a></div></div>
</td>
<td>  obtains a dereferenceable object's associated reference types  <br> <span class="t-mark">(alias template)</span> </td></tr>
</table>
<h4><span class="mw-headline" id="Iterator_category_tags"> Iterator category tags </span></h4>
<table class="t-dsc-begin">

<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in  namespace <code>std::experimental::ranges</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/iterator_tags.html" title="cpp/experimental/ranges/iterator/iterator tags"> <span class="t-lines"><span>input_iterator_tag</span><span>output_iterator_tag</span><span>forward_iterator_tag</span><span>bidirectional_iterator_tag</span><span>random_access_iterator_tag</span></span></a></div></div>
</td>
<td>   empty class types used to indicate iterator categories <br> <span class="t-mark">(class)</span> </td></tr>
</table>
<h4><span class="mw-headline" id="std::iterator_traits_specializations"> <span class="t-lc"><a href="../../../iterator/iterator_traits.html" title="cpp/iterator/iterator traits">std::iterator_traits</a></span> specializations </span></h4>
<table class="t-dsc-begin">

<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in  namespace <code>std</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://en.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/iterator/std_iter_traits&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/iterator/std iter traits (page does not exist)"> <span class="t-lines"><span>std::iterator_traits<span style="font-size:0.7em; line-height:130%">&lt;InputIterator&gt;</span></span><span>std::iterator_traits<span style="font-size:0.7em; line-height:130%">&lt;OutputIterator&gt;</span></span></span></a></div></div>
</td>
<td>  specializes <span class="t-lc"><a href="../../../iterator/iterator_traits.html" title="cpp/iterator/iterator traits">std::iterator_traits</a></span> for ranges TS iterators <br> <span class="t-mark">(class template specialization)</span> </td></tr>
</table>
<h4><span class="mw-headline" id="Iterator_operations"> Iterator operations </span></h4>
<table class="t-dsc-begin">

<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in  namespace <code>std::experimental::ranges</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/advance.html" title="cpp/experimental/ranges/iterator/advance"> <span class="t-lines"><span>advance</span></span></a></div></div>
</td>
<td>  advances an iterator by given distance <br> <span class="t-mark">(function template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/distance.html" title="cpp/experimental/ranges/iterator/distance"> <span class="t-lines"><span>distance</span></span></a></div></div>
</td>
<td>  returns the distance between an iterator and a sentinel, or between the beginning and the end of a range <br> <span class="t-mark">(function template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/next.html" title="cpp/experimental/ranges/iterator/next"> <span class="t-lines"><span>next</span></span></a></div></div>
</td>
<td>  increment an iterator  <br> <span class="t-mark">(function template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/prev.html" title="cpp/experimental/ranges/iterator/prev"> <span class="t-lines"><span>prev</span></span></a></div></div>
</td>
<td>  decrement an iterator  <br> <span class="t-mark">(function template)</span> </td></tr>
</table>
<h3><span class="mw-headline" id="Iterator_adaptors"> Iterator adaptors </span></h3>
<table class="t-dsc-begin">

<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in  namespace <code>std::experimental::ranges</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://en.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/iterator/reverse_iterator&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/iterator/reverse iterator (page does not exist)"> <span class="t-lines"><span>reverse_iterator</span></span></a></div></div>
</td>
<td>  iterator adaptor for reverse-order traversal  <br> <span class="t-mark">(class template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://en.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/iterator/back_insert_iterator&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/iterator/back insert iterator (page does not exist)"> <span class="t-lines"><span>back_insert_iterator</span></span></a></div></div>
</td>
<td>  iterator adaptor for insertion at the end of a container <br> <span class="t-mark">(class template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://en.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/iterator/front_insert_iterator&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/iterator/front insert iterator (page does not exist)"> <span class="t-lines"><span>front_insert_iterator</span></span></a></div></div>
</td>
<td>  iterator adaptor for insertion at the front of a container <br> <span class="t-mark">(class template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://en.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/iterator/insert_iterator&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/iterator/insert iterator (page does not exist)"> <span class="t-lines"><span>insert_iterator</span></span></a></div></div>
</td>
<td>  iterator adaptor for insertion into a container <br> <span class="t-mark">(class template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://en.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/iterator/move_iterator&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/iterator/move iterator (page does not exist)"> <span class="t-lines"><span>move_iterator</span></span></a></div></div>
</td>
<td>  iterator adaptor which dereferences to an rvalue reference  <br> <span class="t-mark">(class template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://en.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/iterator/move_sentinel&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/iterator/move sentinel (page does not exist)"> <span class="t-lines"><span>move_sentinel</span></span></a></div></div>
</td>
<td>  sentinel adaptor for use with <code>move_iterator</code>  <br> <span class="t-mark">(class template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://en.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/iterator/common_iterator&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/iterator/common iterator (page does not exist)"> <span class="t-lines"><span>common_iterator</span></span></a></div></div>
</td>
<td>  adapt an iterator-sentinel pair into a common iterator type for use with legacy algorithms  <br> <span class="t-mark">(class template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://en.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/iterator/counted_iterator&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/iterator/counted iterator (page does not exist)"> <span class="t-lines"><span>counted_iterator</span></span></a></div></div>
</td>
<td>  iterator adaptor that keeps track of its distance from its starting position <br> <span class="t-mark">(class template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://en.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/iterator/default_sentinel&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/iterator/default sentinel (page does not exist)"> <span class="t-lines"><span>default_sentinel</span></span></a></div></div>
</td>
<td>  empty sentinel type for use with iterator types that know the bound of their range <br> <span class="t-mark">(class)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/dangling.html" title="cpp/experimental/ranges/iterator/dangling"> <span class="t-lines"><span>dangling</span></span></a></div></div>
</td>
<td>  wrapper for a possibly dangling iterator <br> <span class="t-mark">(class template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../experimental/ranges/iterator/dangling.html" title="cpp/experimental/ranges/iterator/dangling"> <span class="t-lines"><span>safe_iterator_t</span></span></a></div></div>
</td>
<td>  alias template that wraps the iterator type of an rvalue range with <code>dangling</code>  <br> <span class="t-mark">(alias template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://en.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/iterator/unreachable&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/iterator/unreachable (page does not exist)"> <span class="t-lines"><span>unreachable</span></span></a></div></div>
</td>
<td>  sentinel type used with any iterator to denote an infinite range <br> <span class="t-mark">(class)</span> </td></tr>
</table>
<h3><span class="mw-headline" id="Stream_iterators"> Stream iterators </span></h3>
<table class="t-dsc-begin">

<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in  namespace <code>std::experimental::ranges</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://en.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/iterator/istream_iterator&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/iterator/istream iterator (page does not exist)"> <span class="t-lines"><span>istream_iterator</span></span></a></div></div>
</td>
<td>  input iterator that reads from <span class="t-lc"><a href="../../../io/basic_istream.html" title="cpp/io/basic istream">std::basic_istream</a></span>  <br> <span class="t-mark">(class template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://en.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/iterator/ostream_iterator&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/iterator/ostream iterator (page does not exist)"> <span class="t-lines"><span>ostream_iterator</span></span></a></div></div>
</td>
<td>  output iterator that writes to <span class="t-lc"><a href="../../../io/basic_ostream.html" title="cpp/io/basic ostream">std::basic_ostream</a></span>  <br> <span class="t-mark">(class template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://en.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/iterator/istreambuf_iterator&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/iterator/istreambuf iterator (page does not exist)"> <span class="t-lines"><span>istreambuf_iterator</span></span></a></div></div>
</td>
<td>  input iterator that reads from <span class="t-lc"><a href="../../../io/basic_streambuf.html" title="cpp/io/basic streambuf">std::basic_streambuf</a></span> <br> <span class="t-mark">(class template)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://en.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/iterator/ostreambuf_iterator&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/iterator/ostreambuf iterator (page does not exist)"> <span class="t-lines"><span>ostreambuf_iterator</span></span></a></div></div>
</td>
<td>  output iterator that writes to <span class="t-lc"><a href="../../../io/basic_streambuf.html" title="cpp/io/basic streambuf">std::basic_streambuf</a></span> <br> <span class="t-mark">(class template)</span> </td></tr>
</table>
<h3><span class="mw-headline" id="Synopsis"> Synopsis </span></h3>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span> <span class="kw1">namespace</span> experimental <span class="br0">{</span> <span class="kw1">namespace</span> ranges <span class="br0">{</span> <span class="kw1">inline</span> <span class="kw1">namespace</span> v1 <span class="br0">{</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span> concept <span class="kw4">bool</span> <span class="coMULTI">/* dereferenceable */</span> <span class="co1">// exposition only</span>
  <span class="sy1">=</span> requires<span class="br0">(</span>T<span class="sy3">&amp;</span> t<span class="br0">)</span> <span class="br0">{</span> <span class="br0">{</span><span class="sy2">*</span>t<span class="br0">}</span> <span class="sy2">-</span><span class="sy1">&gt;</span> <span class="kw4">auto</span><span class="sy3">&amp;&amp;</span><span class="sy4">;</span> <span class="br0">}</span><span class="sy4">;</span>
 
<span class="kw1">namespace</span> <span class="br0">{</span>
  <span class="kw4">constexpr</span> <span class="coMULTI">/* unspecified */</span> iter_move <span class="sy1">=</span> <span class="coMULTI">/* unspecified */</span><span class="sy4">;</span>
  <span class="kw4">constexpr</span> <span class="coMULTI">/* unspecified */</span> iter_swap <span class="sy1">=</span> <span class="coMULTI">/* unspecified */</span><span class="sy4">;</span>
<span class="br0">}</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span><span class="sy1">&gt;</span> <span class="kw1">struct</span> difference_type<span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span> <span class="kw1">using</span> difference_type_t
  <span class="sy1">=</span> <span class="kw1">typename</span> difference_type<span class="sy1">&lt;</span>T<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">type</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span><span class="sy1">&gt;</span> <span class="kw1">struct</span> value_type<span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span> <span class="kw1">using</span> value_type_t
  <span class="sy1">=</span> <span class="kw1">typename</span> value_type<span class="sy1">&lt;</span>T<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">type</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span><span class="sy1">&gt;</span> <span class="kw1">struct</span> iterator_category<span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span> <span class="kw1">using</span> iterator_category_t
  <span class="sy1">=</span> <span class="kw1">typename</span> iterator_category<span class="sy1">&lt;</span>T<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">type</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="coMULTI">/* dereferenceable */</span> T<span class="sy1">&gt;</span> <span class="kw1">using</span> reference_t
  <span class="sy1">=</span> decltype<span class="br0">(</span><span class="sy2">*</span>declval<span class="sy1">&lt;</span>T<span class="sy3">&amp;</span><span class="sy1">&gt;</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="coMULTI">/* dereferenceable */</span> T<span class="sy1">&gt;</span>
    requires <span class="coMULTI">/* see definition */</span> <span class="kw1">using</span> rvalue_reference_t
  <span class="sy1">=</span> decltype<span class="br0">(</span><a href="../../../iterator/ranges/iter_move.html"><span class="kw3143">ranges::<span class="me2">iter_move</span></span></a><span class="br0">(</span>declval<span class="sy1">&lt;</span>T<span class="sy3">&amp;</span><span class="sy1">&gt;</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> In<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> Readable <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> Out, <span class="kw1">class</span> T<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> Writable <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> WeaklyIncrementable <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> Incrementable <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> Iterator <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> S, <span class="kw1">class</span> I<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> Sentinel <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> S, <span class="kw1">class</span> I<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> disable_sized_sentinel <span class="sy1">=</span> <span class="kw2">false</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> S, <span class="kw1">class</span> I<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> SizedSentinel <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> InputIterator <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> OutputIterator <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> ForwardIterator <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> BidirectionalIterator <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> RandomAccessIterator <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> F, <span class="kw1">class</span> I<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> IndirectUnaryInvocable <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> F, <span class="kw1">class</span> I<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> IndirectRegularUnaryInvocable <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> F, <span class="kw1">class</span> I<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> IndirectUnaryPredicate <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> F, <span class="kw1">class</span> I1, <span class="kw1">class</span> I2 <span class="sy1">=</span> I1<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> IndirectRelation <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> F, <span class="kw1">class</span> I1, <span class="kw1">class</span> I2 <span class="sy1">=</span> I1<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> IndirectStrictWeakOrder <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span><span class="sy1">&gt;</span> <span class="kw1">struct</span> indirect_result_of<span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> F, <span class="kw1">class</span>... <span class="me1">Is</span><span class="sy1">&gt;</span>
  requires Invocable<span class="sy1">&lt;</span>F, reference_t<span class="sy1">&lt;</span>Is<span class="sy1">&gt;</span>...<span class="sy1">&gt;</span>
<span class="kw1">struct</span> indirect_result_of<span class="sy1">&lt;</span>F<span class="br0">(</span>Is...<span class="br0">)</span><span class="sy1">&gt;</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> F<span class="sy1">&gt;</span>
<span class="kw1">using</span> indirect_result_of_t
  <span class="sy1">=</span> <span class="kw1">typename</span> indirect_result_of<span class="sy1">&lt;</span>F<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">type</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span>Readable I, IndirectRegularUnaryInvocable<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> Proj<span class="sy1">&gt;</span>
<span class="kw1">struct</span> <a href="../../../iterator/projected.html"><span class="kw2681">projected</span></a><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span>WeaklyIncrementable I, <span class="kw1">class</span> Proj<span class="sy1">&gt;</span>
<span class="kw1">struct</span> difference_type<span class="sy1">&lt;</span><a href="../../../iterator/projected.html"><span class="kw2681">projected</span></a><span class="sy1">&lt;</span>I, Proj<span class="sy1">&gt;&gt;</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> In, <span class="kw1">class</span> Out<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> IndirectlyMovable <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> In, <span class="kw1">class</span> Out<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> IndirectlyMovableStorable <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> In, <span class="kw1">class</span> Out<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> IndirectlyCopyable <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> In, <span class="kw1">class</span> Out<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> IndirectlyCopyableStorable <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2 <span class="sy1">=</span> I1<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> IndirectlySwappable <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2, <span class="kw1">class</span> R <span class="sy1">=</span> equal_to<span class="sy1">&lt;&gt;</span>, <span class="kw1">class</span> P1 <span class="sy1">=</span> identity,
    <span class="kw1">class</span> P2 <span class="sy1">=</span> identity<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> IndirectlyComparable <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> Permutable <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2, <span class="kw1">class</span> Out,
    <span class="kw1">class</span> R <span class="sy1">=</span> less<span class="sy1">&lt;&gt;</span>, <span class="kw1">class</span> P1 <span class="sy1">=</span> identity, <span class="kw1">class</span> P2 <span class="sy1">=</span> identity<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> Mergeable <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I, <span class="kw1">class</span> R <span class="sy1">=</span> less<span class="sy1">&lt;&gt;</span>, <span class="kw1">class</span> P <span class="sy1">=</span> identity<span class="sy1">&gt;</span>
concept <span class="kw4">bool</span> Sortable <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> Iterator<span class="sy1">&gt;</span> <span class="kw1">using</span> iterator_traits <span class="sy1">=</span> <span class="coMULTI">/* see definition */</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span>Readable T<span class="sy1">&gt;</span> <span class="kw1">using</span> iter_common_reference_t
  <span class="sy1">=</span> common_reference_t<span class="sy1">&lt;</span>reference_t<span class="sy1">&lt;</span>T<span class="sy1">&gt;</span>, value_type_t<span class="sy1">&lt;</span>T<span class="sy1">&gt;</span><span class="sy3">&amp;</span><span class="sy1">&gt;</span><span class="sy4">;</span>
 
<span class="kw1">struct</span> output_iterator_tag <span class="br0">{</span> <span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">struct</span> input_iterator_tag <span class="br0">{</span> <span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">struct</span> forward_iterator_tag <span class="sy4">:</span> input_iterator_tag <span class="br0">{</span> <span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">struct</span> bidirectional_iterator_tag <span class="sy4">:</span> forward_iterator_tag <span class="br0">{</span> <span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">struct</span> random_access_iterator_tag <span class="sy4">:</span> bidirectional_iterator_tag <span class="br0">{</span> <span class="br0">}</span><span class="sy4">;</span>
 
<span class="kw1">namespace</span> <span class="br0">{</span>
  <span class="kw4">constexpr</span> <span class="coMULTI">/* unspecified */</span> advance <span class="sy1">=</span> <span class="coMULTI">/* unspecified */</span><span class="sy4">;</span>
  <span class="kw4">constexpr</span> <span class="coMULTI">/* unspecified */</span> distance <span class="sy1">=</span> <span class="coMULTI">/* unspecified */</span><span class="sy4">;</span>
  <span class="kw4">constexpr</span> <span class="coMULTI">/* unspecified */</span> next <span class="sy1">=</span> <span class="coMULTI">/* unspecified */</span><span class="sy4">;</span>
  <span class="kw4">constexpr</span> <span class="coMULTI">/* unspecified */</span> prev <span class="sy1">=</span> <span class="coMULTI">/* unspecified */</span><span class="sy4">;</span>
<span class="br0">}</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span>BidirectionalIterator I<span class="sy1">&gt;</span> <span class="kw1">class</span> reverse_iterator<span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires EqualityComparableWith<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span>
    <span class="kw4">const</span> reverse_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
    <span class="kw4">const</span> reverse_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires EqualityComparableWith<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span>
    <span class="kw4">const</span> reverse_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
    <span class="kw4">const</span> reverse_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires StrictTotallyOrderedWith<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">&lt;</span><span class="br0">(</span>
    <span class="kw4">const</span> reverse_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
    <span class="kw4">const</span> reverse_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires StrictTotallyOrderedWith<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">&gt;</span><span class="br0">(</span>
    <span class="kw4">const</span> reverse_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
    <span class="kw4">const</span> reverse_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires StrictTotallyOrderedWith<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">&gt;=</span><span class="br0">(</span>
    <span class="kw4">const</span> reverse_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
    <span class="kw4">const</span> reverse_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires StrictTotallyOrderedWith<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">&lt;=</span><span class="br0">(</span>
    <span class="kw4">const</span> reverse_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
    <span class="kw4">const</span> reverse_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires SizedSentinel<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> difference_type_t<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span> operator<span class="sy2">-</span><span class="br0">(</span>
    <span class="kw4">const</span> reverse_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
    <span class="kw4">const</span> reverse_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span>RandomAccessIterator I<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> reverse_iterator<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> operator<span class="sy2">+</span><span class="br0">(</span>
    difference_type_t<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> n,
    <span class="kw4">const</span> reverse_iterator<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x<span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span>BidirectionalIterator I<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> reverse_iterator<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> make_reverse_iterator<span class="br0">(</span>I i<span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> Container<span class="sy1">&gt;</span> <span class="kw1">class</span> back_insert_iterator<span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> Container<span class="sy1">&gt;</span>
  back_insert_iterator<span class="sy1">&lt;</span>Container<span class="sy1">&gt;</span> back_inserter<span class="br0">(</span>Container<span class="sy3">&amp;</span> x<span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> Container<span class="sy1">&gt;</span> <span class="kw1">class</span> front_insert_iterator<span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> Container<span class="sy1">&gt;</span>
  front_insert_iterator<span class="sy1">&lt;</span>Container<span class="sy1">&gt;</span> front_inserter<span class="br0">(</span>Container<span class="sy3">&amp;</span> x<span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> Container<span class="sy1">&gt;</span> <span class="kw1">class</span> insert_iterator<span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> Container<span class="sy1">&gt;</span>
  insert_iterator<span class="sy1">&lt;</span>Container<span class="sy1">&gt;</span> inserter<span class="br0">(</span>Container<span class="sy3">&amp;</span> x, iterator_t<span class="sy1">&lt;</span>Container<span class="sy1">&gt;</span> i<span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span>InputIterator I<span class="sy1">&gt;</span> <span class="kw1">class</span> move_iterator<span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires EqualityComparableWith<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span>
    <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires EqualityComparableWith<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span>
    <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires StrictTotallyOrderedWith<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">&lt;</span><span class="br0">(</span>
    <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires StrictTotallyOrderedWith<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">&lt;=</span><span class="br0">(</span>
    <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires StrictTotallyOrderedWith<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">&gt;</span><span class="br0">(</span>
    <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires StrictTotallyOrderedWith<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">&gt;=</span><span class="br0">(</span>
    <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires SizedSentinel<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> difference_type_t<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span> operator<span class="sy2">-</span><span class="br0">(</span>
    <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
    <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span>RandomAccessIterator I<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> move_iterator<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> operator<span class="sy2">+</span><span class="br0">(</span>
    difference_type_t<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> n,
    <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x<span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span>InputIterator I<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> move_iterator<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> make_move_iterator<span class="br0">(</span>I i<span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span>Semiregular S<span class="sy1">&gt;</span> <span class="kw1">class</span> move_sentinel<span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I, Sentinel<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> S<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span>
    <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span><span class="sy3">&amp;</span> i, <span class="kw4">const</span> move_sentinel<span class="sy1">&lt;</span>S<span class="sy1">&gt;</span><span class="sy3">&amp;</span> s<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I, Sentinel<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> S<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span>
    <span class="kw4">const</span> move_sentinel<span class="sy1">&lt;</span>S<span class="sy1">&gt;</span><span class="sy3">&amp;</span> s, <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span><span class="sy3">&amp;</span> i<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I, Sentinel<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> S<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span>
    <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span><span class="sy3">&amp;</span> i, <span class="kw4">const</span> move_sentinel<span class="sy1">&lt;</span>S<span class="sy1">&gt;</span><span class="sy3">&amp;</span> s<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I, Sentinel<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> S<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span>
    <span class="kw4">const</span> move_sentinel<span class="sy1">&lt;</span>S<span class="sy1">&gt;</span><span class="sy3">&amp;</span> s, <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span><span class="sy3">&amp;</span> i<span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I, SizedSentinel<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> S<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> difference_type_t<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> operator<span class="sy2">-</span><span class="br0">(</span>
    <span class="kw4">const</span> move_sentinel<span class="sy1">&lt;</span>S<span class="sy1">&gt;</span><span class="sy3">&amp;</span> s, <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span><span class="sy3">&amp;</span> i<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I, SizedSentinel<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> S<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> difference_type_t<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> operator<span class="sy2">-</span><span class="br0">(</span>
    <span class="kw4">const</span> move_iterator<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span><span class="sy3">&amp;</span> i, <span class="kw4">const</span> move_sentinel<span class="sy1">&lt;</span>S<span class="sy1">&gt;</span><span class="sy3">&amp;</span> s<span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span>Semiregular S<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> move_sentinel<span class="sy1">&lt;</span>S<span class="sy1">&gt;</span> make_move_sentinel<span class="br0">(</span>S s<span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span>Iterator I, Sentinel<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> S<span class="sy1">&gt;</span>
  requires <span class="sy3">!</span>Same<span class="sy1">&lt;</span>I, S<span class="sy1">&gt;</span>
<span class="kw1">class</span> common_iterator<span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span>Readable I, <span class="kw1">class</span> S<span class="sy1">&gt;</span>
<span class="kw1">struct</span> value_type<span class="sy1">&lt;</span>common_iterator<span class="sy1">&lt;</span>I, S<span class="sy1">&gt;&gt;</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span>InputIterator I, <span class="kw1">class</span> S<span class="sy1">&gt;</span>
<span class="kw1">struct</span> iterator_category<span class="sy1">&lt;</span>common_iterator<span class="sy1">&lt;</span>I, S<span class="sy1">&gt;&gt;</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span>ForwardIterator I, <span class="kw1">class</span> S<span class="sy1">&gt;</span>
<span class="kw1">struct</span> iterator_category<span class="sy1">&lt;</span>common_iterator<span class="sy1">&lt;</span>I, S<span class="sy1">&gt;&gt;</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2, Sentinel<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span> S1, Sentinel<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span> S2<span class="sy1">&gt;</span>
<span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span>
  <span class="kw4">const</span> common_iterator<span class="sy1">&lt;</span>I1, S1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, <span class="kw4">const</span> common_iterator<span class="sy1">&lt;</span>I2, S2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2, Sentinel<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span> S1, Sentinel<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span> S2<span class="sy1">&gt;</span>
  requires EqualityComparableWith<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
<span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span>
  <span class="kw4">const</span> common_iterator<span class="sy1">&lt;</span>I1, S1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, <span class="kw4">const</span> common_iterator<span class="sy1">&lt;</span>I2, S2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2, Sentinel<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span> S1, Sentinel<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span> S2<span class="sy1">&gt;</span>
<span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span>
  <span class="kw4">const</span> common_iterator<span class="sy1">&lt;</span>I1, S1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, <span class="kw4">const</span> common_iterator<span class="sy1">&lt;</span>I2, S2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I2, SizedSentinel<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span> I1, SizedSentinel<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span> S1, SizedSentinel<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span> S2<span class="sy1">&gt;</span>
difference_type_t<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span> operator<span class="sy2">-</span><span class="br0">(</span>
  <span class="kw4">const</span> common_iterator<span class="sy1">&lt;</span>I1, S1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, <span class="kw4">const</span> common_iterator<span class="sy1">&lt;</span>I2, S2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">class</span> default_sentinel<span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span>Iterator I<span class="sy1">&gt;</span> <span class="kw1">class</span> counted_iterator<span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires Common<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span>
    <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span>
  <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span><span class="kw4">auto</span><span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, default_sentinel<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span>
  default_sentinel, <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span><span class="kw4">auto</span><span class="sy1">&gt;</span><span class="sy3">&amp;</span> x<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires Common<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span>
    <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span>
  <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span><span class="kw4">auto</span><span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, default_sentinel y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span>
  default_sentinel x, <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span><span class="kw4">auto</span><span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires Common<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">&lt;</span><span class="br0">(</span>
    <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires Common<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">&lt;=</span><span class="br0">(</span>
    <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires Common<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">&gt;</span><span class="br0">(</span>
    <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires Common<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">&gt;=</span><span class="br0">(</span>
    <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I1, <span class="kw1">class</span> I2<span class="sy1">&gt;</span>
    requires Common<span class="sy1">&lt;</span>I1, I2<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> difference_type_t<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span> operator<span class="sy2">-</span><span class="br0">(</span>
    <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span>I1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span>I2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> difference_type_t<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> operator<span class="sy2">-</span><span class="br0">(</span>
    <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, default_sentinel y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> I<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> difference_type_t<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> operator<span class="sy2">-</span><span class="br0">(</span>
    default_sentinel x, <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span>RandomAccessIterator I<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> counted_iterator<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span>
    operator<span class="sy2">+</span><span class="br0">(</span>difference_type_t<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> n, <span class="kw4">const</span> counted_iterator<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x<span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span>Iterator I<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> counted_iterator<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> make_counted_iterator<span class="br0">(</span>I i, difference_type_t<span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> n<span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">class</span> unreachable<span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span>Iterator I<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> I<span class="sy3">&amp;</span>, unreachable<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span>Iterator I<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span>unreachable, <span class="kw4">const</span> I<span class="sy3">&amp;</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span>Iterator I<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> I<span class="sy3">&amp;</span>, unreachable<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span>Iterator I<span class="sy1">&gt;</span>
  <span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span>unreachable, <span class="kw4">const</span> I<span class="sy3">&amp;</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span> <span class="kw1">class</span> dangling<span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> T, <span class="kw1">class</span> charT <span class="sy1">=</span> <span class="kw4">char</span>, <span class="kw1">class</span> traits <span class="sy1">=</span> char_traits<span class="sy1">&lt;</span>charT<span class="sy1">&gt;</span>,
    <span class="kw1">class</span> Distance <span class="sy1">=</span> ptrdiff_t<span class="sy1">&gt;</span>
  <span class="kw1">class</span> istream_iterator<span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> T, <span class="kw1">class</span> charT, <span class="kw1">class</span> traits, <span class="kw1">class</span> Distance<span class="sy1">&gt;</span>
  <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> istream_iterator<span class="sy1">&lt;</span>T, charT, traits, Distance<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
    <span class="kw4">const</span> istream_iterator<span class="sy1">&lt;</span>T, charT, traits, Distance<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> T, <span class="kw1">class</span> charT, <span class="kw1">class</span> traits, <span class="kw1">class</span> Distance<span class="sy1">&gt;</span>
  <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span>default_sentinel x,
    <span class="kw4">const</span> istream_iterator<span class="sy1">&lt;</span>T, charT, traits, Distance<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> T, <span class="kw1">class</span> charT, <span class="kw1">class</span> traits, <span class="kw1">class</span> Distance<span class="sy1">&gt;</span>
  <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> istream_iterator<span class="sy1">&lt;</span>T, charT, traits, Distance<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
    default_sentinel y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> T, <span class="kw1">class</span> charT, <span class="kw1">class</span> traits, <span class="kw1">class</span> Distance<span class="sy1">&gt;</span>
  <span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> istream_iterator<span class="sy1">&lt;</span>T, charT, traits, Distance<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
    <span class="kw4">const</span> istream_iterator<span class="sy1">&lt;</span>T, charT, traits, Distance<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> T, <span class="kw1">class</span> charT, <span class="kw1">class</span> traits, <span class="kw1">class</span> Distance<span class="sy1">&gt;</span>
  <span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span>default_sentinel x,
    <span class="kw4">const</span> istream_iterator<span class="sy1">&lt;</span>T, charT, traits, Distance<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> T, <span class="kw1">class</span> charT, <span class="kw1">class</span> traits, <span class="kw1">class</span> Distance<span class="sy1">&gt;</span>
  <span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> istream_iterator<span class="sy1">&lt;</span>T, charT, traits, Distance<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
    default_sentinel y<span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> T, <span class="kw1">class</span> charT <span class="sy1">=</span> <span class="kw4">char</span>, <span class="kw1">class</span> traits <span class="sy1">=</span> char_traits<span class="sy1">&lt;</span>charT<span class="sy1">&gt;&gt;</span>
  <span class="kw1">class</span> ostream_iterator<span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> charT, <span class="kw1">class</span> traits <span class="sy1">=</span> char_traits<span class="sy1">&lt;</span>charT<span class="sy1">&gt;</span> <span class="sy1">&gt;</span>
  <span class="kw1">class</span> istreambuf_iterator<span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> charT, <span class="kw1">class</span> traits<span class="sy1">&gt;</span>
  <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> istreambuf_iterator<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> a,
    <span class="kw4">const</span> istreambuf_iterator<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> b<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> charT, <span class="kw1">class</span> traits<span class="sy1">&gt;</span>
  <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span>default_sentinel a,
    <span class="kw4">const</span> istreambuf_iterator<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> b<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> charT, <span class="kw1">class</span> traits<span class="sy1">&gt;</span>
  <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> istreambuf_iterator<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> a,
    default_sentinel b<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> charT, <span class="kw1">class</span> traits<span class="sy1">&gt;</span>
  <span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> istreambuf_iterator<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> a,
    <span class="kw4">const</span> istreambuf_iterator<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> b<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> charT, <span class="kw1">class</span> traits<span class="sy1">&gt;</span>
  <span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span>default_sentinel a,
    <span class="kw4">const</span> istreambuf_iterator<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> b<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> charT, <span class="kw1">class</span> traits<span class="sy1">&gt;</span>
  <span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> istreambuf_iterator<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> a,
    default_sentinel b<span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> charT, <span class="kw1">class</span> traits <span class="sy1">=</span> char_traits<span class="sy1">&lt;</span>charT<span class="sy1">&gt;</span> <span class="sy1">&gt;</span>
  <span class="kw1">class</span> ostreambuf_iterator<span class="sy4">;</span>
 
<span class="br0">}</span><span class="br0">}</span><span class="br0">}</span><span class="br0">}</span>
 
<span class="kw1">namespace</span> std <span class="br0">{</span>
  <span class="kw1">template</span> <span class="sy1">&lt;</span>experimental<span class="sy4">::</span><span class="me2">ranges</span><span class="sy4">::</span><span class="me2">Iterator</span> Out<span class="sy1">&gt;</span>
    <span class="kw1">struct</span> iterator_traits<span class="sy1">&lt;</span>Out<span class="sy1">&gt;</span><span class="sy4">;</span>
  <span class="kw1">template</span> <span class="sy1">&lt;</span>experimental<span class="sy4">::</span><span class="me2">ranges</span><span class="sy4">::</span><span class="me2">InputIterator</span> In<span class="sy1">&gt;</span>
    <span class="kw1">struct</span> iterator_traits<span class="sy1">&lt;</span>In<span class="sy1">&gt;</span><span class="sy4">;</span>
  <span class="kw1">template</span> <span class="sy1">&lt;</span>experimental<span class="sy4">::</span><span class="me2">ranges</span><span class="sy4">::</span><span class="me2">InputIterator</span> In<span class="sy1">&gt;</span>
      requires experimental<span class="sy4">::</span><span class="me2">ranges</span><span class="sy4">::</span><span class="me2">Sentinel</span><span class="sy1">&lt;</span>In, In<span class="sy1">&gt;</span>
    <span class="kw1">struct</span> iterator_traits<span class="sy4">;</span>
<span class="br0">}</span></pre></div></div>

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